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(11) | EP 2 582 041 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Apparatus and Method for Interleaving Switching in Power Amplifier |
| (57) An apparatus of a hybrid power modulator using interleaving switching is provided.
The apparatus includes a linear switching unit for generating an output signal by
comparing an envelope input signal and a feedback signal, an interleaving signal generator
for generating an interleaving switching signal arranged not to supply the signal
to input stages of P-type Metal-Oxide- Semiconductor (MOS) Field Effect Transistors
(FETs) and N-type MOS FETs of power cells at the same time by comparing the output
signal and a reference signal, and a switching amplifying unit for determining a level
of the switching signal using the interleaving switching signal. Hence, the hybrid
power modulator using the interleaving switching method in the envelope signal of
the wide bandwidth maintains high efficiency and high linearity. In addition, the
buck converter can use the single inductor by preventing the simultaneous on/off of
the power cells.
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